Automatic elevator control.



E. L DUNN.

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AFPLETION FILED SEPT. l2. 1913.

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2 SHEETS---SHKE l.

\ egim@ E. L. DUNN.

AUTOMATIC ELEVATOR CNTROL.

APPLICATIQN FILED SEPT. 12. 19x33 1555.837., melma om, i9, 1915.,

@est In ventor:

30 store ail ith@ parts to nmm 45 scx'iptinn of T0 @ZZ Wham it maycammini Bc it imowxi that irmvmug@ L. DUNN? a citizcicf thc UnitedSimilis, residing "Worcester, in die coimy ci: /"cx'ccsci' Smic oflia'ssdciiusets2 hws inve d nain lcw and useful mprowmcnt: i' @maticEicvatoi' Conti'ois, @if which cwiug is a fidi, clem, :imi exactspcciicatiem This invention rclaes to automatic cle-- 'vaterccgntrodcrs, and has pmicuiai' ieici'- cnc@ $0 am improved floor indium@consruclbion whereby the circuits :imipais uc con! Sidcraby simpiified.,un@ cls/J4 e adjust- 25 Tha sariing of thc machine n stop cu'- cui,which is compatc by an indicator thc cui; and

to cpm t in n but m many instances it 1s prceinble io 'mpi "y themschanism permiing the moto? io meclmcaly sperm@ a' satiomuy 1. 1 Swich'ic stcp che om: ii, s ais@ desu'anlc @minds aie'r acgusment of che,ioor "By thcconsluction herein csciibed, the

foregoing bjects are attained, tog-@ther with' Various Ginkel-advantageswhich will more .ul am )eac m coimectlon wlth the, de-

purposes of ililsxifaion 0V a. 'gull of push .cixcaiiisj so as necessarystanding QI' this invention, can readily bc traced thicugh the motmswitch contacts.

he' accompanying drawings and "che up contacts when an up magnct U is`encigizcd The curlcnlis supplied from 'the mes through fuses f, j, andthe motor to an uncle? The ciicliitsfotixci' vthzm'he motor cii'cuitsae, first, a Sim-ting circui, second, a maintaining cii'cuit, and 21br'anchcd circuit im' ih@ main mitch magnet. The dosing; of a pushinztioi, ci' :my @they form of stm-ting swich, wili energize a i001magnct, which Wl cios@ a, swch and sinergia@ one of "che main switchmagnets B 0i' U, dcpcudilg upon. the posit-ion of hc indicator'relatively to 'thepiisii button which is operated, the indica'oi'having a down sid". in circuit with magnet alici mi up siCie in circuitwith magnet SQ that only (me cii'cui; at a time can be made. Theiiaaininining; circui is also "pio- 'vided with a non-interferenceswitch 'which is closed only when the mailt. 'Switch is @pen und Opfeucby cinefili of the main switch so h'nt wie? ou@ push button is Qpeyndtc@nii of thc @thm-s .Su-if, cut ou. D001 switch euch Hoor ami one also inche cai if desii'ed.

At each floor is :i Sciics p Sh butons '8, 8. Q, ein@ corresponding; toith@ vai-ions Hoclrs and icspectivciy in mulsiplc Wi'bh wiies .9, L 0,ctc., so thai the orveia'ion ci? any push nut-i011 S corr-esg-:mdixig toa Scor connects wife. Wit thcwviies m igusei' U, these two sides beingseparati-1d ggg y l 1,156,987'

fm2, fm, m4, m5, m, m7 which are all connected on the other side inmultiple with a wire 10, which leads through door switches l in series,thence by wire 11`baclr to fuse f1.

E groin fuse f' tbe maintaining circuit leads oy wire 12 to contacts 13of magnets fm", m2, etc., which is bridged by armature 14- when themagnet is energized by a push button to contact 15 from which ,contacts15, wires l@ '16 lead to stationary' switch contacts s1, .92, s3, 8*,si", 86, ST, etc., .there being one for each floor. Cooperating withthese stationary contacts s1, etc., are movable contacts4 carried bylevers 17 pivoted at 18 on a suitable ,l5 base. The levers 17 in ,'Fig.1, in order to be 'shown diagrammaticaljly, are turned in a 90 plane,their correct position being as shown in Figs. 2 and 3, wherein theyswing toward and from a vertical plane. The mov- 20 able contactscarriedby the levers 17 are connected by wires 19 to brushes b1, b2, b5, fetc., which bear onthe ripheryof two direction segments SD, S whichareinsulated from eachother and mounted on aslate base B which is rotatedin synchro-- raisin with the elevator by a shaft S. As ishowxitin Fig,l, the brush b4 is resting on fthe insulation between segments 'SD andSU showing switch s* open and consequently 130 the elevator is stoppedat the fourth floor.

The brushes b1, Zit, 3 are therefore-in contact with segment SD and theremaining rushes, other than b4, are in contact with segment SU. lt willthereforebe seen that 85 wheneJ push-button corresponding to-flool 2 ispushed, magnet m2 will be energized and. a current sent through'`armainire 14: and Wire 16, switch a2 to brush b2, thence through thesegment SD to brush b1, thence 4U by wire 21 through magnet l) and wire22 to fuse f1. 'lt a button be operated corre spending to the floorWhere the car is al vready stopped, it will be seen that the start ingcircuit is not made, because the brush or" that floor will be `on theinsulation between segments SD andS'U, as is shown in the case of brushb4 in Fig. 1. At the same time that magnet m2 moved armature 14 toconnect contacts 13, 15, it moved an arma ture23 to' connect contacts24, 25, thereby supplying current from wire 16 through switch s?,wire19, brush b2, wire 27 to contact 241, armature 23, Contact 25 towire 9 ct magnet 2, 'thus maintaining magnet m2 energized after thepush'button has been released and also after non-interference .switch 6has opened. Shouldy any door switch Zbe opened, however, magnet m2 wouldbedenergized and also the main c switch magnet and the car stopped.

"With the position shown in the drawings, with the car stopped at thefourth floor, upon closing,r a push button 4tor floor 2, mag- 'net l)will be energized and thel car will go down and continue running untilthe'switch e is mechanically opened by tbe. indicator. These switchess1, etc., are successively opened as the indicator passes, but will beobserved that only one of these switches (the one corresponding to thedestination vc the brush, as b4, will rest on the insulation 7?:

between lsegments ySD and SU.

Referring now to Figs. 2 and 3, the slate B, segments SU, SD, shaft S,switch con tact s* and lever 17 can readily be distinguished. The lever17 is pivoted ht 30 bracket 31, which is adjustably mountedfon acircular slotted ring 32,I as by bolt and nut 34. MThe preferredconstruction that an insulating strip willvconnect the stationarycontact sf and its holder 37 with socket 38 formed in bracket 31carrying the brush b1,` 19 lbeing a spring vfor pressing' the brushesb1, etc., against the periphery ot ment SD or SU. Small screws connw.:the insulating strip 35 with brush socket Il and the socket 37forfccntact s4. The wire 27 is fastened to socket 38 and wire 16 tosocket 37, the current being carried from ythe movable 'contact 36 onlever 17' and spring 19 -to socket 38,- when 36 is closed on et. 1t willbe observed that contact 36 is nstably lmounted in lever 17, so tba-twhen. screwed in or out it will change the pr tion of the inner end 15of lever 17. Tb

end L15 of lever 17 carries a roller wb a l* engages with a doublebeveled cam 4:7 d justably. mounted in 'a holder 48 bolted to slate B.The cam 117 is held by set screw 49 and can be moved readily by set 50,so that by adjusting screw contact on the end of lever 17 and adjustingcam F by set screw 50, the precise moment at which the contacts 36 ands* will open can be very accurately determined, thus'dotermining thefloor" stop. This is addition to the adjustment of the entire levermechanism on ring 32 by bolt 33 and nut 34.

In practice,',the general positions of the levers 17 for the variousfloors will be determined by properly positioning them on the ring, thenthe floor stops can be still more finely adjusted by setting the cam 1Tby set screw 50. If necessary, contact 36 also adjusted.

It will be seen that the spring 19 posi tively closes the circuit assoon-,as the com 47 moves away from the roller. 4G, and the cam 17positively holds the Hswitch ope-sn suici'ently to prevent arcingacross. s It will. beun'derstoodthat these switches are simillarlyconstructed for each licor, and si; cessively operate as the com e? pasvarious rollers 4:6, but only ot tV switches will be alive, the onecorrespond y, ing to the predestined' floor stop. i'

the 'RF vided for that the control circuits can From the foregoingdescription, it will be seenthat a comparatively'simple indi# catormechanism is provided by this invention in which the stop switches canbe mechanically opened to effect the stop, with an extremevdegree ofaccuracy.

The use of large contacts is permitted so from Athe motor circuitswithout danger of burning out, though that the starting and maintainingcircuits can be entirely distinct from the motor circuits withoutaffecting the invention.

Various modifications and changes in details may be vmade withoutdeparting from the scope of the invention, it being understood that anynumber of floors can be em ployed, and by reason of moving the leverstoward and from the plane of theindicator a very large number of stopscan be proin a relatively small space, there being, furthermore, but onemagnet for each .door in addition to the main switch up and downmagnets. This permits a considerable simplicity of wiring as well a`sreduction in cost of installation and maintenance. Having thus describedmy invention, I declare that what I claim as new and desire to secure byLetters Patent is I 1j. In an automatic elevator, the cmbinaltion withreversible controlling,means, o

main up and down magnets for operating said means, anl indicator movablesynchronously with the car having separated up and down sidesrespectively connected to said up and down magnets,'circuitscorresponding to the several floors leading from said indicator, eachcircuit terminating in a brush bearing on said indicator, said brushesbeing transferred from one side of said indicator to the other as thecar passes the corresponding floor, a normally closed switch in eachcircuit, a holding 4magnet correspending to each licor circuit, meansfor selectively energizing one of said floor magnets to start the car,and means operated by said indicator for mechanically opening saidswitches .to stop the car at the floor whose magnet was energized.

2. In an automatic elevator, the combination with reversible controllingmeans, of main up and down magnets for operating said means, anindicator movable synchronously with the car having upand down sidesrespectively connected to said up and down magnets, circuits c severalfloors leading each'circuit being transferred frdm onev side of saidindicator to the other as the car passes the corresponding floor, aholding magnet corresponding to each floor circuit, means forselectively energizing said floor magnets to start the car to apredetermined floor and maintaining a circuit through said indicator tosaid main and floor magnets, a

be supplied means, of up it will be understood.

orresponding to the from said indicator,y

f normally closed floor switch in each of said floor circuits adjacentsa'id indicator, and means carried by the indicator for inechani callyoperating said switches whereby te stop the car when the predeterminedfloor circuit is opened by said indicator.

3. In an automatic elevator system, the combination with reversiblecontrolling and down controlling magnets therefor, means forestablishing a running circuit to one of 'said magnets, plurality ofcircuit closers for said magnets corresponding to a plurality of floors,an indicator driven with the car and having an up and a down siderespectively' in circuit with said controlling magnets, licor circuitsfrom said circuit closers to said indicator, 'said circuits beingtransferred from one side of said indicator to the other as the carpasses the corresponding door, a series of normally closed ioor switchesarranged. to be me# chanically opened as said circuits are tran-sferred,and means between said up and down sides of said indicator forsuccessively actuating said switches to stopthe car when a live doorcircuit is opened. i

4. In an automatic elevator, an indi ator comprising a reversible shaft,a pair of sepa-v rated circular contact segments driven by said shaft, acam between said contacts, and a series of switches arrangedconcentrically with said contact segments, each switch having a leverprojecting into the path. of said cam, said levers being successivelyactuated by the cam.

5. In an automatic elevator, an indicator comprising a reversible shaft,a pair of sepan rated circular contact segments driven by said shaft, acam between and moving with said contact segments, and a series ofrelatively liXed, normally closed switches ranged concentrically withsaid Contact segments, eachswitcli having a lever arm projecting intothe path et said cam, sai lever arms being successively actuated by themoving cam and being circularly adiustable relatively to said cam.

6. In an automatic elevator, a reversible rotatable shaft, a pair ofseparated circular contact segments mounted thereon and insu.- latedtherefrom, a cam carriedby said shaft anddisposed betweensaid contactsegments',

lil() and relatively stationary brackets carrying one or more contactbrushes bearing on the periphery of said segments, and normally closedswitches adapted to be controlled by said cam.

7 In an automatic elevator, a reversible rotatable shaft, a pair ofseparated circular con act segments mounted thereon and insu.- latedtherefrom, a cam carried by said shaft and disposed between said contactsegments, and 'relatively stationary brackets carrying one or morecontact brushes bearing on the periphery of ,said se; its and normallyclosed switches adapted to be Controlled by said earn, Said bracketsbeing adjustably mounted to vary the time of opening' er" said switchesby' said cam.

'llie eonibination Witlr a reversibly driven cam, ef a relativelystationary switeln a lever carrying a Contact of said Switch at one end,said cani engaging the other end ol said lever te aetuate said switelii,said switch Contact being adjustable on the lever to vary the time ofengagement of the lever and the cam.

9. The Combination with a n reversibly d riveli cam, 0f a relativelystatienary switch, :i lever carrying a Contact of s aiel switch et uneend, said cum engaging the' other end oit' said lever toeetuate saidswitch, seid switch contact being adjustable on the lever to vary thetime el engagement, et the lever and the cani, and lever and svvitelibeing bodily adjustable relatively to the cem to further vary .tlieftimeof engagement of seid cani and lever..

10. The combinationwith a reversibly `driven earn, of a relativelj;7stationery norN mally closed svviteh,'co1npri.sing a, lever ein# ryinga'contaet of seid switch at one end7 'said can). engaging the other englof seid l lever te zictuete said switch, said switch @oir tactbeingvvadjustable on the lever te vary the time of 'engagement of the leverand 'tbe weee? cani, und. c

sind. lever.

anal-from lll Tb' combination with 'reversiblv" driven eemj of erelatively staelena-ry sxviteli, :i lever carrying a eenteet of' SaidSwitch at one endjseicl earn engaging tlie'otliei e= l el? said lever toaetuate Seid .evvitelr said invite-lr Contact being adjustable en thelever te time the engagement of the lever end. the earn, a Contact.Segment :nevin with zam, and a centaet brush carried' by tbe leverswiteli support ceperating with saitL Contact ment. j

l2. An :internati 3 elevei'er eentrellff-r eolie:-

prising a rotatable digli, seniriterl dire( litnesses: i

ffm FAI, n P @Vessem u. .il

being adjustable toward Ail)

